observe growing neighborhood segregation based on BMI and its associated economic and
walkability attributes. If sorting compounds with time across geographic locales, the resulting
segregation could lead to obesity “hot spots” where the need for intervention would be the
greatest and ability to change physical activity and/or diet may be the most challenging (57).
Unabated concentration of people into such intense BMI locales is not likely, if taken to the
extreme, so it is important to understand what forces would mitigate such a trend.